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We have a few homes that were built in an area identified as a Radon Hot Zone.
We were required to add forced ventilation into the crawl space.
But no requirement to monitor.
Most of the home buyers probably didn’t read the mouse print of their purchase agreement, and have no idea the blowers are in the crawl.
There was no requirement to supply any alarms to notify the residence if the blowers fail either.
If anyone knows of a good monitoring system for Radon; I would be interested in that info as well

We have a few homes that were built in an area identified as a Radon Hot Zone.
We were required to add forced ventilation into the crawl space.
But no requirement to monitor.
Most of the home buyers probably didn’t read the mouse print of their purchase agreement, and have no idea the blowers are in the crawl.
There was no requirement to supply any alarms to notify the residence if the blowers fail either.
If anyone knows of a good monitoring system for Radon; I would be interested in that info as well

Google the "Safety Siren Pro Series" and you will find a suitable device for residential stuff. I need something for commercial buildings, preferably with wall & duct mounted options.

I am just wondering if you had any success finding any Radon monitoring equipment that could be connected to a BAS. I have a customer with the same requirements that you mention in your original post. I have been looking and am not having much luck. In this day with all the concerns for IEQ i would have thought there was something readily available. Any help you can offer would be appreciated.